I really hope you achieve your goal. It's disheartening that you are losing motivation . My advice to you is that you find something to look forward to say.. A partner at the gym or the next cheat day. Stick with a healthy diet and keep your eyes on the prize when doing cardiovascular activity. Work hard during the weekdays without breaking your diet then on the weekend have a meal that you'd like to steamroll your mentally for the weekday to come. Hopes and Cheers!